Which is the better choice for you? Only you can make that determination- neither is "better" than the other. Some of the considerations are:
Where do you want to live?
Do you wan to get your work done in two 8-day periods, or split up between threes and fours here and there?
How much do you NEED to make in the next few years?
Got any turbine PIC/type ratings?
What are your ultimate goals?
If your goal is to be a coporate pilot, go with the frax.
If you want to fly 121, I would consider going to the frax until movement starts again (I mean REAL movement). That way, you will get a type rating, get some good training and jet experience, and get better pay- and be able to put some nuts aaway for that first year at a regional or national.
If your goal is to go to Comair and retire there, then I would go there now, but I would move to CVG for the first few years, especially if you are married. Commuting back and forth while on reserve, and paying for a crash pad on first year pay would really be lousy, at least for me. I have friend who started in Jan and he is miserable- I don't think he knew how bad commuting on reserve would be. Even worse would be an off-line commute and/or a commute with more than one leg . . . .
I researched this pretty carefully last year- I had offers from FLOPS and an interview scheduled at EJA when I got on at AirTran. I probably could have been happy at any of them, but AirTran was the best fit for me.